Aside from that, Aperture was abandoned 5 years ago. I would blame Apple for not releasing a 64-bit version of it before dropping it, but not for dropping 32-bit altogether.
It's possible to get it running in 10.15 by removing the references to those frameworks, it breaks some of the features like slideshows but the app will still run: https://medium.com/@cormiertyshawn895/deep-dive-how-does-ret... (the author has also made an app that automates this process, I haven't tried it so I can't vouch for how well it works)
If you go to Windows and use Lightroom, why not stay on your mac?
If you go to Linux and use FSpot or Darktable, you can get them both on a Mac too.